Abstract
A significant tendency is shown for both Etesians and (+, −) sector boundaries of the interplanetary magnetic field (IMF) to occur on the same solar rotation days, during the main period of the Etesians effect (July–August). In addition, the solar activity seems to control the Etesians distribution within the IMF sector structure. In the epoch of maximum there is a significant tendency of Etesians to occur during ‘toward’ IMF days. In contrast, in the epoch of minimum Etesians occur mainly during ‘away’ IMF days. Finally, in the epoch of intermediate the Etesians are uniformly distributed in ‘away’ and ‘toward’ IMF days. Since these conclusions are statistically significant at high confidence levels, it is fair to assume that IMF and solar activity seem to contribute, to some extent, to the Etesians occurrences, as well as to their distribution within the solar rotation and the IMF sector structure; that is, some solar contribution to the tropospheric circulation is implied.
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